/Engine/Source/Runtime/Engine/Public/Animation/AnimNodeMessages.h
Call the supplied function with each node subscribed to the specified message in this stack
template<typename TGraphMessageType> void ForEachMessage ( [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< [EEnumerate](API\Runtime\Engine\Animation\FMessageStack\EEnumerate)(TGraphMessageType &)> InFunction ) const